1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
// LuaState.cpp
// Implements the cLuaState class representing the wrapper over lua_State *, provides associated helper functions
#include "Globals.h"
#include "LuaState.h"
extern "C"
{
#include "lualib.h"
}
#include "tolua++.h"
#include "Bindings.h"
#include "ManualBindings.h"
// fwd: SQLite/lsqlite3.c
extern "C"
{
LUALIB_API int luaopen_lsqlite3(lua_State * L);
}
// fwd: LuaExpat/lxplib.c:
extern "C"
{
int luaopen_lxp(lua_State * L);
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cLuaState:
cLuaState::cLuaState(const AString & a_SubsystemName) :
m_LuaState(NULL),
m_SubsystemName(a_SubsystemName)
{
}
cLuaState::~cLuaState()
{
if (IsValid())
{
Close();
}
}
void cLuaState::Create(void)
{
if (m_LuaState != NULL)
{
LOGWARNING("%s: Trying to create an already-existing LuaState, ignoring.", __FUNCTION__);
return;
}
m_LuaState = lua_open();
luaL_openlibs(m_LuaState);
tolua_AllToLua_open(m_LuaState);
ManualBindings::Bind(m_LuaState);
luaopen_lsqlite3(m_LuaState);
luaopen_lxp(m_LuaState);
}
void cLuaState::Close(void)
{
if (m_LuaState == NULL)
{
LOGWARNING("%s: Trying to close an invalid LuaState, ignoring.", __FUNCTION__);
return;
}
lua_close(m_LuaState);
m_LuaState = NULL;
}
bool cLuaState::LoadFile(const AString & a_FileName)
{
ASSERT(IsValid());
// Load the file:
int s = luaL_loadfile(m_LuaState, a_FileName.c_str());
if (ReportErrors(s))
{
LOGWARNING("Can't load %s because of an error in file %s", m_SubsystemName.c_str(), a_FileName.c_str());
return false;
}
// Execute the globals:
s = lua_pcall(m_LuaState, 0, LUA_MULTRET, 0);
if (ReportErrors(s))
{
LOGWARNING("Error in %s in file %s", m_SubsystemName.c_str(), a_FileName.c_str());
return false;
}
return true;
}
bool cLuaState::PushFunction(const char * a_FunctionName, bool a_ShouldLogFailure /* = true */)
{
if (!IsValid())
{
// This happens if cPlugin::Initialize() fails with an error
return false;
}
lua_getglobal(m_LuaState, a_FunctionName);
if (!lua_isfunction(m_LuaState, -1))
{
if (a_ShouldLogFailure)
{
LOGWARNING("Error in %s: Could not find function %s()", m_SubsystemName.c_str(), a_FunctionName);
}
lua_pop(m_LuaState, 1);
return false;
}
return true;
}
bool cLuaState::PushFunctionFromRegistry(int a_FnRef)
{
lua_rawgeti(m_LuaState, LUA_REGISTRYINDEX, a_FnRef); // same as lua_getref()
if (!lua_isfunction(m_LuaState, -1))
{
lua_pop(m_LuaState, 1);
return false;
}
return true;
}
void cLuaState::PushStringVector(const AStringVector & a_Vector)
{
lua_createtable(m_LuaState, a_Vector.size(), 0);
int newTable = lua_gettop(m_LuaState);
int index = 1;
for (AStringVector::const_iterator itr = a_Vector.begin(), end = a_Vector.end(); itr != end; ++itr, ++index)
{
tolua_pushstring(m_LuaState, itr->c_str());
lua_rawseti(m_LuaState, newTable, index);
}
}
bool cLuaState::CallFunction(int a_NumArgs, int a_NumResults, const char * a_FunctionName)
{
ASSERT(lua_isfunction(m_LuaState, -a_NumArgs - 1));
int s = lua_pcall(m_LuaState, a_NumArgs, a_NumResults, 0);
if (ReportErrors(s))
{
LOGWARNING("Error in %s calling function %s()", m_SubsystemName.c_str(), a_FunctionName);
return false;
}
return true;
}
bool cLuaState::ReportErrors(int a_Status)
{
return ReportErrors(m_LuaState, a_Status);
}
bool cLuaState::ReportErrors(lua_State * a_LuaState, int a_Status)
{
if (a_Status == 0)
{
// No error to report
return false;
}
LOGWARNING("LUA: %d - %s", a_Status, lua_tostring(a_LuaState, -1));
lua_pop(a_LuaState, 1);
return true;
}
|
